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GB/T 223.88-2019
钢铁及合金 钙和镁含量的测定 电感耦合等离子体原子发射光谱法
Iron, steel and alloy—Determination of calcium and magnesium contents—Inductively coupled plasma atomic emission spectrometric method
GB/T 3903.43-2019
Footwear—Test methods for uppers,lining and insocks—Seam strength
GB/T 3323.1-2019
Non-destructive testing of welds—Radiographic testing—Part 1:X- and gamma-ray techniques with film
GB/Z 17624.4-2019
电磁兼容 综述 2kHz内限制设备工频谐波电流传导发射的历史依据
Electromagnetic compatibility—General—Historical rationale for the limitation of power-frequency conducted harmonic current emissions from equipment, in the frequency range up to 2 kHz
GB/T 37543-2019
Measurement method for total electric field strength and ion current density of DC transmission line and converter station
GB/T 3903.42-2019
Footwear—Test methods for uppers,lining and insocks—Colour migration
GB/T 20114-2019
Specific test methods for d.c. machines on conventional and rectifier-fed supplies